[jdk17u-dev] RFR: 8302736: Major performance regression in Math.log on aarch64

[Andrew Haley]

On Mon, 17 Jul 2023 09:26:21 GMT, Goetz Lindenmaier <goetz at openjdk.org> wrote:

> I backport this for parity with 17.0.9-oracle.
> 
> I resolved runtime.cpp because the comment in the context 
> differs.
> I omitted the change to continuationFreezeThaw.cpp.
> This file is not in 17. It contains loom code, loom is not in 17.

We must be extremely careful back-porting this change. It's a fragile part of the system, and it's been changed a few times. We don't have a stable base to back-port it to.

It may make more sense to confine this patch to Math.log rather than making a global change.

-------------

PR Comment: https://git.openjdk.org/jdk17u-dev/pull/1588#issuecomment-1640132446